Just wondering which cartridge to buy for when I go crow decoying. I went shooting the other day and used eley 28gram 7 1/2 shot fibre cartridges, they are good value for money but a lot of the time it wasn't a clean kill or a few feathers just fell down and it carried on flying. Need some recommendations please, e.g. shot no., brand. Also which chokes are the best, at the moment i am using 1/4 and a 1/2??